more than just a screen name

I bought my 1971 Duster 340 from David Frieburger, the editor of Hot Rod Magazine. I didn't know who he was at the time. DFX 340 Duster = David Frieburger's eX-340 Duster. DFX is also a tribute to the old Factory eXperimental classification. I was going to stab a New Gen Hemi in the car, hence the FX descriptor, but David, my neighbor, and my friends convinced me to put a 340 in the car since it is an H code. So I added the D and made the double meaning.